{"id":2777,"date":"2024-12-17T17:20:56","date_gmt":"2024-12-17T09:20:56","guid":{"rendered":"https:\/\/www.trugemtech.com\/?p=2777"},"modified":"2024-12-17T17:21:22","modified_gmt":"2024-12-17T09:21:22","slug":"\u4ec0\u4e48\u662f-netmask","status":"publish","type":"post","link":"https:\/\/www.trugemtech.com\/zh\/\u4ec0\u4e48\u662f-netmask\/","title":{"rendered":"\u4ec0\u4e48\u662f\u7f51\u7edc\u63a9\u7801\uff1f"},"content":{"rendered":"<p>\u5728\u8ba1\u7b97\u673a\u7f51\u7edc\u4e2d\uff0c\u4e86\u89e3\u5982\u4f55\u7ba1\u7406 IP \u5730\u5740\u5bf9\u4e8e\u8bbe\u5907\u4e4b\u95f4\u7684\u6709\u6548\u901a\u4fe1\u81f3\u5173\u91cd\u8981\u3002\u63a9\u7801\u662f\u5e2e\u52a9\u7ec4\u7ec7\u548c\u7ba1\u7406 IP \u7f51\u7edc\u7684\u4e00\u4e2a\u57fa\u672c\u6982\u5ff5\u3002\u4f46\u7a76\u7adf\u4ec0\u4e48\u662f netmask\uff0c\u5b83\u4e3a\u4ec0\u4e48\u91cd\u8981\uff1f\u5728\u672c\u535a\u5ba2\u4e2d\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u4ec0\u4e48\u662f\u63a9\u7801\u3001\u63a9\u7801\u7684\u5de5\u4f5c\u539f\u7406\u4ee5\u53ca\u63a9\u7801\u5728\u5b50\u7f51\u5212\u5206\u548c IP \u901a\u4fe1\u4e2d\u7684\u4f5c\u7528\u3002\u6211\u4eec\u8fd8\u5c06\u89e3\u91ca\u5982\u4f55\u6392\u9664\u76f8\u5173\u95ee\u9898\u7684\u6545\u969c\uff0c\u5e76\u56de\u7b54\u6709\u5173\u7f51\u7edc\u63a9\u7801\u7684\u5e38\u89c1\u95ee\u9898\u3002<\/p>\n\n\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>\u76ee\u5f55<\/h2><ul><li><a href=\"#h-what-is-netmask\" data-level=\"2\">\u4ec0\u4e48\u662f\u7f51\u7edc\u63a9\u7801\uff1f<\/a><\/li><li><a href=\"#h-how-does-a-netmask-work\" data-level=\"2\">\u7f51\u7edc\u63a9\u7801\u5982\u4f55\u5de5\u4f5c\uff1f<\/a><\/li><li><a href=\"#h-how-to-read-a-netmask\" data-level=\"2\">\u5982\u4f55\u8bfb\u53d6\u7f51\u7edc\u63a9\u7801<\/a><\/li><li><a href=\"#h-how-to-calculate-the-number-of-hosts-in-a-network-using-a-netmask\" data-level=\"2\">\u5982\u4f55\u4f7f\u7528\u7f51\u7edc\u63a9\u7801\u8ba1\u7b97\u7f51\u7edc\u4e2d\u7684\u4e3b\u673a\u6570\u91cf<\/a><\/li><li><a href=\"#h-what-is-the-difference-between-a-netmask-and-a-subnet-mask\" data-level=\"2\">\u7f51\u7edc\u63a9\u7801\u548c\u5b50\u7f51\u63a9\u7801\u6709\u4f55\u533a\u522b\uff1f<\/a><\/li><li><a href=\"#h-how-can-i-troubleshoot-netmask-related-issues\" data-level=\"2\">\u5982\u4f55\u6392\u9664\u4e0e\u7f51\u7edc\u63a9\u7801\u76f8\u5173\u7684\u95ee\u9898\uff1f<\/a><ul><li><a href=\"#h-common-configuration-errors\" data-level=\"3\">\u5e38\u89c1\u914d\u7f6e\u9519\u8bef<\/a><\/li><li><a href=\"#h-tools-for-troubleshooting\" data-level=\"3\">\u6545\u969c\u6392\u9664\u5de5\u5177<\/a><\/li><li><a href=\"#h-how-to-troubleshoot-netmask-issues\" data-level=\"3\">\u5982\u4f55\u6392\u9664\u7f51\u7edc\u63a9\u7801\u95ee\u9898<\/a><\/li><\/ul><\/li><li><a href=\"#h-frequently-asked-questions-faqs\" data-level=\"2\">\u5e38\u89c1\u95ee\u9898 (FAQ)<\/a><\/li><\/ul><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-netmask\">\u4ec0\u4e48\u662f\u7f51\u7edc\u63a9\u7801\uff1f<\/h2>\n\n\n\n<p>A <strong>\u51c0\u63a9\u7801<\/strong> \u662f IP \u7f51\u7edc\u4e2d\u4f7f\u7528\u7684 32 \u4f4d\u6570\u5b57\uff0c\u7528\u4e8e\u5b9a\u4e49 IP \u5730\u5740\u4e2d\u54ea\u90e8\u5206\u6307\u7f51\u7edc\uff0c\u54ea\u90e8\u5206\u6307\u4e3b\u673a\u3002\u5b83\u901a\u5e38\u7528\u5341\u8fdb\u5236\u8868\u793a\uff0c\u56db\u4e2a\u516b\u4f4d\u4f4d\u7ec4\u4e4b\u95f4\u7528\u70b9\u9694\u5f00\uff08\u4f8b\u5982\u3001 <code>255.255.255.0<\/code>) .<\/p>\n\n\n\n<p>\u7f51\u7edc\u63a9\u7801\u4e0d\u4ec5\u6709\u52a9\u4e8e\u786e\u5b9a\u7f51\u7edc\u7684\u5927\u5c0f\uff0c\u4ee5\u53ca\u8be5\u7f51\u7edc\u5185\u53ef\u5206\u914d IP \u5730\u5740\u7684\u8bbe\u5907\uff08\u4e3b\u673a\uff09\u6570\u91cf\u3002\u6b64\u5916\uff0c\u5b83\u8fd8\u4e0e IP \u5730\u5740\u4e00\u8d77\u7528\u4e8e\u533a\u5206\u7f51\u7edc\u90e8\u5206\u548c\u4e3b\u673a\u90e8\u5206\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-does-a-netmask-work\">\u7f51\u7edc\u63a9\u7801\u5982\u4f55\u5de5\u4f5c\uff1f<\/h2>\n\n\n\n<p>\u8981\u4e86\u89e3\u4e00\u4e2a <strong>\u51c0\u63a9\u7801<\/strong> \u9996\u5148\uff0c\u5fc5\u987b\u4e86\u89e3\u5b83\u4e0e IP \u5730\u5740\u7684\u5173\u7cfb\u3002\u5728 IPv4 \u5730\u5740\u7cfb\u7edf\u4e2d<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\" <strong>\u7f51\u7edc\u90e8\u5206<\/strong> \u6807\u8bc6\u7279\u5b9a\u7f51\u7edc\u3002<\/li>\n\n\n\n<li>\" <strong>\u4e3b\u673a\u90e8\u5206<\/strong> \u8bc6\u522b\u8be5\u7f51\u7edc\u5185\u7684\u5355\u4e2a\u8bbe\u5907\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u63a9\u7801\u7528\u4e8e \"\u5c4f\u853d \"\u6216\u9690\u85cf IP \u5730\u5740\u7684\u4e3b\u673a\u90e8\u5206\uff0c\u786e\u5b9a\u54ea\u4e9b\u6bd4\u7279\u5c5e\u4e8e\u7f51\u7edc\u3002\u4f8b\u5982<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IP \u5730\u5740\uff1a <code>192.168.1.10<\/code><\/li>\n\n\n\n<li>\u7f51\u7edc\u63a9\u7801\uff1a <code>255.255.255.0<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u5728\u8fd9\u91cc\uff0c\u524d 24 \u4f4d (<code>255.255.255<\/code>\uff09\u5b9a\u4e49\u7f51\u7edc\uff0c\u5176\u4f59 8 \u4f4d (<code>.0<\/code>) \u662f\u4e3a\u4e3b\u673a\u4fdd\u7559\u7684\u3002\u56e0\u6b64\uff0c\u540c\u4e00\u7f51\u7edc\u5185\u7684\u6240\u6709\u8bbe\u5907\uff08\u5982 <code>192.168.1.x<\/code>) \u5171\u4eab\u540c\u4e00\u4e2a\u7f51\u7edc\u90e8\u5206\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-read-a-netmask\">\u5982\u4f55\u8bfb\u53d6\u7f51\u7edc\u63a9\u7801<\/h2>\n\n\n\n<p>\u7f51\u7edc\u63a9\u7801\u53ef\u4ee5\u7528\u4e24\u79cd\u5e38\u89c1\u683c\u5f0f\u8868\u793a\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u5e26\u70b9\u5c0f\u6570\u8bb0\u6cd5<\/strong>:\u8fd9\u662f\u6700\u5e38\u7528\u7684\u7f51\u7edc\u63a9\u7801\u8868\u793a\u65b9\u6cd5\uff0c\u5176\u4e2d\u6bcf\u4e2a\u516b\u4f4d\u4f4d\u7ec4\uff088 \u4f4d\u7ec4\uff09\u90fd\u5199\u6210\u5341\u8fdb\u5236\u6570\uff0c\u7528\u70b9\u5206\u9694\u3002\u4f8b\u5982 <code>255.255.255.0<\/code><\/li>\n\n\n\n<li><strong>CIDR \u7b26\u53f7<\/strong>:\u8fd9\u79cd\u7b26\u53f7\u4f7f\u7528\u659c\u7ebf\u540e\u7684\u6570\u5b57\u6765\u8868\u793a\u7f51\u7edc\u63a9\u7801\u3002\u6570\u5b57\u8868\u793a IP \u5730\u5740\u7f51\u7edc\u90e8\u5206\u7684\u4f4d\u6570\u3002\u793a\u4f8b <code>\/24<\/code><\/li>\n<\/ol>\n\n\n\n<p>\u5728 CIDR \u7b26\u53f7\u4e2d\uff0c\u659c\u7ebf (\/) \u540e\u9762\u7684\u6570\u5b57\u4ee3\u8868\u7f51\u7edc\u4f4d\u603b\u6570\u3002\u4f8b\u5982<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>\/24<\/code> \u5373\u524d 24 \u4f4d\u4e3a\u7f51\u7edc\u90e8\u5206\uff0c\u5176\u4f59 8 \u4f4d\u76f8\u5e94\u4e3a\u4e3b\u673a\u90e8\u5206\u3002<\/li>\n\n\n\n<li><code>\/16<\/code> \u5373\u524d 16 \u4f4d\u4e3a\u7f51\u7edc\u90e8\u5206\uff0c\u5176\u4f59 16 \u4f4d\u76f8\u5e94\u5730\u4e3a\u4e3b\u673a\u90e8\u5206\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u89e3\u91ca\u7f51\u7edc\u63a9\u7801\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>255<\/strong> \u7528\u70b9\u5341\u8fdb\u5236\u8868\u793a\uff0c\u4ee3\u8868\u4e8c\u8fdb\u5236\uff08\u7f51\u7edc\u6bd4\u7279\uff09\u4e2d\u7f6e 1 \u7684 8 \u4e2a\u6bd4\u7279\u3002<\/li>\n\n\n\n<li><strong>0<\/strong> \u7528\u70b9\u5341\u8fdb\u5236\u8868\u793a\uff0c\u4ee3\u8868\u4e8c\u8fdb\u5236\u4e2d\u8bbe\u7f6e\u4e3a 0 \u7684 8 \u4e2a\u6bd4\u7279\uff08\u4e3b\u673a\u6bd4\u7279\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u5982<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>255.255.255.0<\/code> \u4e8c\u8fdb\u5236\u4e3a <code>11111111.11111111.11111111.00000000<\/code><\/li>\n\n\n\n<li>\u524d 24 \u4f4d\u4e3a\u7f51\u7edc\u4f4d\uff0c\u540e 8 \u4f4d\u4e3a\u4e3b\u673a\u4f4d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u6b64\uff0c255.255.255.0 \u6216 \/24 \u7684\u51c0\u63a9\u7801\u8868\u793a IPv4 \u5730\u5740\u7684\u524d 24 \u4f4d\u7528\u4e8e\u7f51\u7edc\u90e8\u5206\uff0c\u5176\u4f59 8 \u4f4d\u7528\u4e8e\u4e3b\u673a\u90e8\u5206\u3002\u8fd9\u6837\uff0c\u5355\u4e2a\u7f51\u7edc\u4e0a\u6700\u591a\u53ef\u6709 256 \u4e2a\u4e3b\u673a\u5730\u5740\uff08\u4ece .1 \u5230 .254\uff0c\u5176\u4e2d .0 \u4e3a\u7f51\u7edc\u5730\u5740\u4fdd\u7559\uff0c.255 \u4e3a\u5e7f\u64ad\u5730\u5740\u4fdd\u7559\uff09\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-calculate-the-number-of-hosts-in-a-network-using-a-netmask\">\u5982\u4f55\u4f7f\u7528\u7f51\u7edc\u63a9\u7801\u8ba1\u7b97\u7f51\u7edc\u4e2d\u7684\u4e3b\u673a\u6570\u91cf<\/h2>\n\n\n\n<p>\u8981\u8ba1\u7b97\u7f51\u7edc\u4e2d\u7684\u4e3b\u673a\u603b\u6570\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\uff1a<\/p>\n\n\n\n<p><strong>\u4e3b\u673a\u6570\u91cf = 2^\uff08\u4e3b\u673a\u6570\u91cf <\/strong><strong>\u4f4d<\/strong><strong>) - 2<\/strong><\/p>\n\n\n\n<p>2 \u7684\u51cf\u6cd5\u8868\u793a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\" <strong>\u7f51\u7edc\u5730\u5740<\/strong> (\u6240\u6709\u4e3b\u673a\u4f4d\u5747\u8bbe\u7f6e\u4e3a 0\uff09\u3002<\/li>\n\n\n\n<li>\" <strong>\u5e7f\u64ad\u5730\u5740<\/strong> (\u6240\u6709\u4e3b\u673a\u4f4d\u5747\u8bbe\u4e3a 1\uff09\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u793a\u4f8b<\/h3>\n\n\n\n<p>\u7f51\u7edc\u63a9\u7801\u4e3a <code>255.255.255.0<\/code> (\u5728 CIDR \u7b26\u53f7\u4e2d\u4e5f\u79f0\u4e3a \/24\uff09\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e3b\u673a\u603b\u4f4d\u6570 = 32\uff08\u603b\u4f4d\u6570\uff09- 24\uff08\u7f51\u7edc\u4f4d\u6570\uff09= 8<\/li>\n\n\n\n<li>\u4e3b\u673a\u6570\u91cf = 2^8 - 2 = 254<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\u8be5\u7f51\u7edc\u53ef\u4e3a 254 \u53f0\u8bbe\u5907\u5206\u914d IP \u5730\u5740\u3002\u7f51\u7edc\u5730\u5740\uff08\u5982 192.168.1.0\uff09\u548c\u5e7f\u64ad\u5730\u5740\uff08\u5982 192.168.1.255\uff09\u88ab\u4fdd\u7559\uff0c\u4e0d\u80fd\u7528\u4e8e\u4efb\u4f55\u76ee\u7684\u3002 <a href=\"https:\/\/www.trugemtech.com\/zh\/\u7269\u8054\u7f51\u7f51\u5173-2\/\">\u8bbe\u5907<\/a>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"2280\" height=\"1280\" src=\"https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1.jpeg\" alt=\"\u4ec0\u4e48\u662f\u7f51\u7edc\u63a9\u7801\" class=\"wp-image-2780\" style=\"width:auto;height:500px\" srcset=\"https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1.jpeg 2280w, https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1-300x168.jpeg 300w, https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1-1024x575.jpeg 1024w, https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1-768x431.jpeg 768w, https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1-1536x862.jpeg 1536w, https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1-2048x1150.jpeg 2048w, https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1-18x10.jpeg 18w\" sizes=\"(max-width: 2280px) 100vw, 2280px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-the-difference-between-a-netmask-and-a-subnet-mask\">\u7f51\u7edc\u63a9\u7801\u548c\u5b50\u7f51\u63a9\u7801\u6709\u4f55\u533a\u522b\uff1f<\/h2>\n\n\n\n<p>\u7f51\u7edc\u63a9\u7801\u548c\u5b50\u7f51\u63a9\u7801\u8fd9\u4e24\u4e2a\u672f\u8bed\u7ecf\u5e38\u4e92\u6362\u4f7f\u7528\uff0c\u5728\u73b0\u4ee3\u7f51\u7edc\u4e2d\uff0c\u5b83\u4eec\u6307\u7684\u662f\u540c\u4e00\u79cd\u4e1c\u897f\uff1a\u7528\u4e8e\u5c06 IP \u5730\u5740\u5212\u5206\u4e3a\u7f51\u7edc\u548c\u4e3b\u673a\u90e8\u5206\u7684\u4f4d\u63a9\u7801\u3002<\/p>\n\n\n\n<p>\u4e0d\u8fc7\uff0cnetmask \u548c subnet mask \u4e4b\u95f4\u7684\u533a\u522b\u6e90\u4e8e\u8f83\u65e9\u7684\u7f51\u7edc\u672f\u8bed\u548c\u5b9e\u8df5\u3002<\/p>\n\n\n\n<p>\u8fc7\u53bb\uff0cIP \u5730\u5740\u6839\u636e\u5176\u7b2c\u4e00\u4e2a\u516b\u4f4d\u4f4d\u7ec4\u5206\u4e3a A\u3001B \u548c C \u4e09\u7c7b\u3002\u6bcf\u4e2a\u7c7b\u522b\u90fd\u6709\u4e00\u4e2a\u9ed8\u8ba4\u7684\u63a9\u7801\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A \u7c7b\uff1a 255.0.0.0<\/li>\n\n\n\n<li>B \u7c7b\uff1a255.255.0.0<\/li>\n\n\n\n<li>C \u7c7b\uff1a 255.255.255.0<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e9b\u9ed8\u8ba4\u7684\u7f51\u7edc\u63a9\u7801\u7528\u4e8e\u786e\u5b9a\u7f51\u7edc\u7684\u5927\u5c0f\u548c\u8be5\u7f51\u7edc\u5185\u53ef\u5206\u914d IP \u5730\u5740\u7684\u4e3b\u673a\u6570\u91cf\u3002<\/p>\n\n\n\n<p>\u4e0d\u8fc7\uff0c\u968f\u7740 CIDR\uff08\u65e0\u7c7b\u57df\u95f4\u8def\u7531\uff09\u7684\u51fa\u73b0\uff0cIP \u5730\u5740\u7c7b\u7684\u6982\u5ff5\u5df2\u7ecf\u8fc7\u65f6\u3002CIDR \u5141\u8bb8\u66f4\u7075\u6d3b\u5730\u5212\u5206\u5b50\u7f51\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u63a9\u7801\u503c\uff08\u800c\u4e0d\u4ec5\u4ec5\u662f\u6bcf\u4e2a\u7c7b\u7684\u9ed8\u8ba4\u503c\uff09\u5c06\u7f51\u7edc\u5212\u5206\u4e3a\u66f4\u5c0f\u7684\u5b50\u7f51\u7edc\uff08\u5b50\u7f51\uff09\u3002<\/p>\n\n\n\n<p>\u5728\u73b0\u4ee3\u7f51\u7edc\u4e2d\uff0c\"\u5b50\u7f51\u63a9\u7801 \"\u4e00\u8bcd\u7ecf\u5e38\u4e0e \"netmask \"\u4e92\u6362\u4f7f\u7528\uff0c\u6307\u7684\u662f\u5b9a\u4e49 IP \u5730\u5740\u4e2d\u7f51\u7edc\u548c\u4e3b\u673a\u90e8\u5206\u8fb9\u754c\u7684\u4f4d\u63a9\u7801\u3002\u6b64\u5916\uff0c\u5b50\u7f51\u63a9\u7801\u8fd8\u7528\u4e8e\u501f\u7528 IP \u5730\u5740\u4e3b\u673a\u90e8\u5206\u7684\u4f4d\u6765\u521b\u5efa\u5b50\u7f51\uff0c\u4ece\u800c\u521b\u5efa\u989d\u5916\u7684\u7f51\u7edc\u4f4d\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e00\u4e2a\u7f51\u7edc\u7684\u9ed8\u8ba4\u5b50\u7f51\u63a9\u7801\u4e3a 255.255.255.0\uff08C \u7c7b\u7f51\u7edc\uff09\u3002\u5982\u679c\u8981\u5c06\u8be5\u7f51\u7edc\u5206\u4e3a\u4e24\u4e2a\u5b50\u7f51\uff0c\u53ef\u4ee5\u5c06\u5b50\u7f51\u63a9\u7801\u66f4\u6539\u4e3a 255.255.255.128\u3002\u8fd9\u4e2a\u5b50\u7f51\u63a9\u7801\u4ece IP \u5730\u5740\u7684\u4e3b\u673a\u90e8\u5206\u501f\u7528\u4e86\u4e00\u4e2a\u4f4d\uff0c\u7136\u540e\u521b\u5efa\u4e86\u4e00\u4e2a\u989d\u5916\u7684\u7f51\u7edc\u4f4d\u3002\u8fd9\u6837\uff0c\u5c31\u6709\u4e86\u4e24\u4e2a\u8f83\u5c0f\u7684\u7f51\u7edc\uff0c\u6bcf\u4e2a\u7f51\u7edc\u90fd\u6709\u81ea\u5df1\u7684\u7f51\u7edc\u5730\u5740\u548c\u4e3b\u673a\u5730\u5740\u8303\u56f4\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-can-i-troubleshoot-netmask-related-issues\">\u5982\u4f55\u6392\u9664\u4e0e\u7f51\u7edc\u63a9\u7801\u76f8\u5173\u7684\u95ee\u9898\uff1f<\/h2>\n\n\n\n<p>\u4e0e\u7f51\u7edc\u63a9\u7801\u76f8\u5173\u7684\u95ee\u9898\u4f1a\u5bfc\u81f4\u7f51\u7edc\u901a\u4fe1\u95ee\u9898\uff0c\u5982\u8bbe\u5907\u65e0\u6cd5\u8fde\u63a5\u5230\u7f51\u7edc\u6216\u65e0\u6cd5\u6b63\u5e38\u901a\u4fe1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-common-configuration-errors\">\u5e38\u89c1\u914d\u7f6e\u9519\u8bef<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u4e0d\u6b63\u786e\u7684\u7f51\u7edc\u63a9\u7801\u5206\u914d<\/strong>:\u540c\u4e00\u7f51\u7edc\u4e2d\u7684\u8bbe\u5907\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684\u7f51\u7edc\u63a9\u7801\u3002\u5982\u679c\u7f51\u7edc\u63a9\u7801\u914d\u7f6e\u9519\u8bef\uff0c\u901a\u4fe1\u5c06\u5931\u8d25\u3002<\/li>\n\n\n\n<li><strong>\u91cd\u53e0\u5b50\u7f51<\/strong>:\u4f7f\u7528\u4f1a\u5bfc\u81f4 IP \u5730\u5740\u5728\u7f51\u7edc\u95f4\u91cd\u53e0\u7684\u7f51\u7edc\u63a9\u7801\u4f1a\u5f15\u8d77\u8def\u7531\u51b2\u7a81\u3002<\/li>\n\n\n\n<li><strong>\u4e0d\u5339\u914d\u7684\u5b50\u7f51\u63a9\u7801<\/strong>:\u540c\u4e00\u7f51\u7edc\u4e2d\u8bbe\u5907\u4e4b\u95f4\u5206\u914d\u7684\u7f51\u7edc\u63a9\u7801\u4e0d\u4e00\u81f4\uff0c\u53ef\u80fd\u4f1a\u4e2d\u65ad\u8fde\u63a5\u3002<\/li>\n\n\n\n<li><strong>\u4e3b\u673a\u5206\u914d\u4e0d\u5f53<\/strong>:\u5206\u914d\u4e00\u4e2a\u8303\u56f4\u5185\u7684\u6240\u6709 IP \u5730\u5740\uff0c\u5305\u62ec\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\uff0c\u7136\u540e\u4ea7\u751f\u51b2\u7a81\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-tools-for-troubleshooting\">\u6545\u969c\u6392\u9664\u5de5\u5177<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u5e73<\/strong><strong> \u6307\u6325<\/strong>:\u4f7f\u7528 <code>\u4e52<\/code> \u547d\u4ee4\u6765\u9a8c\u8bc1\u8bbe\u5907\u4e4b\u95f4\u7684\u8fde\u63a5\u6027\u3002<\/li>\n\n\n\n<li><strong>IPconfig<\/strong><strong>\/<\/strong><strong>IFconfig<\/strong>:\u68c0\u67e5\u8bbe\u5907\u4e0a\u7684 IP \u5730\u5740\u548c\u63a9\u7801\u914d\u7f6e\u3002<\/li>\n\n\n\n<li><strong>\u8ddf\u8e2a\u8def\u7531<\/strong>:\u9a8c\u8bc1\u6570\u636e\u5305\u7684\u8def\u5f84\u3002<\/li>\n\n\n\n<li><strong>\u5b50\u7f51\u8ba1\u7b97\u5668<\/strong>:\u4f7f\u7528\u5728\u7ebf\u5b50\u7f51\u8ba1\u7b97\u5668\u9a8c\u8bc1\u7f51\u7edc\u63a9\u7801\u548c\u5b50\u7f51\u914d\u7f6e\u3002<\/li>\n\n\n\n<li><strong>\u7f51\u7edc\u626b\u63cf\u5de5\u5177<\/strong>:Nmap \u7b49\u5de5\u5177\u53ef\u5e2e\u52a9\u68c0\u6d4b\u7f51\u7edc\u4e2d\u7684\u914d\u7f6e\u95ee\u9898\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-to-troubleshoot-netmask-issues\">\u5982\u4f55\u6392\u9664\u7f51\u7edc\u63a9\u7801\u95ee\u9898<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u9a8c\u8bc1\u914d\u7f6e<\/strong>:\u68c0\u67e5\u540c\u4e00\u7f51\u7edc\u4e2d\u7684\u6240\u6709\u8bbe\u5907\u662f\u5426\u6709\u6b63\u786e\u7684 IP \u5730\u5740\u548c\u7f51\u7edc\u63a9\u7801\u3002<\/li>\n\n\n\n<li><strong>\u68c0\u67e5\u8def\u7531\u8868<\/strong>:\u9a8c\u8bc1\u8def\u7531\u8868\u662f\u5426\u5305\u542b\u91cd\u53e0\u6216\u51b2\u7a81\u8def\u7531\u3002<\/li>\n\n\n\n<li><strong>\u9694\u79bb\u8bbe\u5907<\/strong>:\u6682\u65f6\u65ad\u5f00\u7f51\u7edc\u63a9\u7801\u914d\u7f6e\u9519\u8bef\u7684\u8bbe\u5907\uff0c\u4ee5\u786e\u5b9a\u95ee\u9898\u6240\u5728\u3002<\/li>\n\n\n\n<li><strong>\u91cd\u65b0\u914d\u7f6e <\/strong><strong>IP<\/strong><strong> \u5730\u5740<\/strong>:\u7ea0\u6b63 IP \u5730\u5740\u548c\u7f51\u7edc\u63a9\u7801\u5206\u914d\u4e2d\u7684\u4efb\u4f55\u9519\u8bef\u3002<\/li>\n\n\n\n<li><strong>\u6d4b\u8bd5\u8fde\u63a5\u6027<\/strong>:\u4f7f\u7528 ping \u548c traceroute \u547d\u4ee4\u786e\u8ba4\u8bbe\u5907\u80fd\u5426\u6b63\u5e38\u901a\u4fe1\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions-faqs\">\u5e38\u89c1\u95ee\u9898 (FAQ)<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1734423324448\"><strong class=\"schema-faq-question\"><strong>\u5982\u4f55\u67e5\u627e\u7f51\u7edc\u7684\u63a9\u7801\uff1f<\/strong><\/strong> <p class=\"schema-faq-answer\"><em>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u67e5\u627e\u7f51\u7edc\u7684\u63a9\u7801\uff1a<br\/>\u5728 Windows \u7cfb\u7edf\u4e0a\uff1a\u4f7f\u7528 <code>ipconfig<\/code> \u547d\u4ee4\u3002<br\/>\u5728 Linux\/Mac \u4e0a\u4f7f\u7528 <code>ifconfig<\/code> \u6216 <code>ip a<\/code> \u547d\u4ee4\u3002<\/em><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1734423353556\"><strong class=\"schema-faq-question\"><strong>\u80fd\u5426\u66f4\u6539\u73b0\u6709\u7f51\u7edc\u7684\u63a9\u7801\uff1f<\/strong><\/strong> <p class=\"schema-faq-answer\"><em>\u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u66f4\u6539\u7f51\u7edc\u63a9\u7801\uff0c\u4f46\u9700\u8981\u91cd\u65b0\u914d\u7f6e\u7f51\u7edc\u4e2d\u7684\u6240\u6709\u8bbe\u5907\u3002\u66f4\u6539\u7f51\u7edc\u63a9\u7801\u8fd8\u53ef\u80fd\u5f71\u54cd IP \u5730\u5740\u5206\u914d\u3002<\/em><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1734423376822\"><strong class=\"schema-faq-question\"><strong>\u540c\u4e00\u7f51\u7edc\u4e2d\u53ef\u4ee5\u6709\u4e0d\u540c\u7684\u7f51\u7edc\u63a9\u7801\u5417\uff1f<\/strong><\/strong> <p class=\"schema-faq-answer\"><em>\u867d\u7136\u53ef\u884c\uff0c\u4f46\u4e0d\u5efa\u8bae\u8fd9\u6837\u505a\u3002\u540c\u4e00\u7f51\u7edc\u4e2d\u7684\u4e0d\u540c\u7f51\u7edc\u63a9\u7801\u4f1a\u5bfc\u81f4\u901a\u4fe1\u95ee\u9898\u548c\u8def\u7531\u9519\u8bef\u3002<\/em><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1734423394886\"><strong class=\"schema-faq-question\"><strong>\u7f51\u7edc\u63a9\u7801\u53ef\u4ee5\u5927\u4e8e 32 \u4f4d\u5417\uff1f<\/strong><\/strong> <p class=\"schema-faq-answer\"><em>\u4e0d\u53ef\u4ee5\uff0cIPv4 \u7684\u63a9\u7801\u4e0d\u80fd\u8d85\u8fc7 32 \u4f4d\u3002IPv4 \u5730\u5740\u7684\u603b\u4f4d\u6570\u9650\u5236\u4e3a 32 \u4f4d\u3002<\/em><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1734423494674\"><strong class=\"schema-faq-question\"><strong>\u7f51\u7edc\u63a9\u7801\u5982\u4f55\u5f71\u54cd\u7f51\u7edc\u901a\u4fe1\uff1f<\/strong><\/strong> <p class=\"schema-faq-answer\"><em>\u7f51\u7edc\u63a9\u7801\u51b3\u5b9a\u4e86\u7f51\u7edc\u7684\u8fb9\u754c\u3002\u8bbe\u5907\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684\u7f51\u7edc\u63a9\u7801\u624d\u80fd\u5728\u672c\u5730\u7f51\u7edc\u5185\u901a\u4fe1\u3002\u4e0d\u6b63\u786e\u7684\u7f51\u7edc\u63a9\u7801\u4f1a\u5bfc\u81f4\u901a\u4fe1\u5931\u8d25\u3002<\/em><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1734423513901\"><strong class=\"schema-faq-question\"><strong>\u80fd\u5426\u4f7f\u7528\u7f51\u7edc\u63a9\u7801\u963b\u6b62\u6216\u5141\u8bb8\u8bbf\u95ee\u67d0\u4e9b IP \u5730\u5740\uff1f<\/strong><\/strong> <p class=\"schema-faq-answer\"><em>\u4e0d\uff0c\u4ec5\u4f7f\u7528\u63a9\u7801\u4e0d\u80fd\u963b\u6b62\u6216\u5141\u8bb8 IP \u5730\u5740\u3002\u4e0d\u8fc7\uff0c\u5b83\u53ef\u4ee5\u4e0e\u8bbf\u95ee\u63a7\u5236\u5217\u8868\uff08ACL\uff09\u6216\u9632\u706b\u5899\u4e00\u8d77\u4f7f\u7528\uff0c\u4e3a\u8bbf\u95ee\u63a7\u5236\u5b9a\u4e49\u7f51\u7edc\u8fb9\u754c\u3002<\/em><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1734423531605\"><strong class=\"schema-faq-question\"><strong>\u7f51\u7edc\u63a9\u7801\u4e0e\u4e92\u8054\u7f51\u534f\u8bae (IP) \u8def\u7531\u6709\u4f55\u5173\u7cfb\uff1f<\/strong><\/strong> <p class=\"schema-faq-answer\"><em>\u63a9\u7801\u5bf9 IP \u8def\u7531\u81f3\u5173\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u80fd\u5e2e\u52a9\u8def\u7531\u5668\u786e\u5b9a\u76ee\u6807\u7f51\u7edc\u3002\u53d1\u9001\u6570\u636e\u5305\u65f6\uff0c\u8def\u7531\u5668\u4f7f\u7528\u76ee\u6807 IP \u5730\u5740\u548c\u63a9\u7801\u6765\u786e\u5b9a\u5c06\u6570\u636e\u5305\u8f6c\u53d1\u5230\u54ea\u4e2a\u6b63\u786e\u7684\u7f51\u7edc\u3002\u5982\u679c\u6ca1\u6709\u7f51\u7edc\u63a9\u7801\uff0c\u8def\u7531\u5668\u5c31\u65e0\u6cd5\u533a\u5206\u4e0d\u540c\u7684\u7f51\u7edc\uff0c\u4ece\u800c\u5bfc\u81f4\u8def\u7531\u5931\u8d25\u3002<\/em><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1734423547033\"><strong class=\"schema-faq-question\"><strong>\u7f51\u7edc\u63a9\u7801\u4f1a\u5f71\u54cd\u7f51\u7edc\u6027\u80fd\u5417\uff1f<\/strong><\/strong> <p class=\"schema-faq-answer\"><em>\u662f\u7684\uff0c\u4e0d\u6b63\u786e\u914d\u7f6e\u7684\u7f51\u7edc\u63a9\u7801\u4f1a\u5bfc\u81f4\u8def\u7531\u9519\u8bef\u3001\u4e0d\u5fc5\u8981\u7684\u5e7f\u64ad\u6d41\u91cf\u6216 IP \u51b2\u7a81\uff0c\u4ece\u800c\u5f71\u54cd\u7f51\u7edc\u6027\u80fd\u3002<\/em><\/p> <\/div> <\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>\u5728\u8ba1\u7b97\u673a\u7f51\u7edc\u4e2d\uff0c\u4e86\u89e3\u5982\u4f55\u7ba1\u7406 IP \u5730\u5740\u5bf9\u4e8e\u8bbe\u5907\u4e4b\u95f4\u7684\u6709\u6548\u901a\u4fe1\u81f3\u5173\u91cd\u8981\u3002\u63a9\u7801\u662f\u5e2e\u52a9\u7ec4\u7ec7\u548c\u7ba1\u7406 IP \u7f51\u7edc\u7684\u4e00\u4e2a\u57fa\u672c\u6982\u5ff5\u3002\u4f46\u7a76\u7adf\u4ec0\u4e48\u662f netmask\uff0c\u5b83\u4e3a\u4ec0\u4e48\u91cd\u8981\uff1f\u5728\u672c\u535a\u5ba2\u4e2d\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u4ec0\u4e48\u662f\u63a9\u7801\u3001\u63a9\u7801\u7684\u5de5\u4f5c\u539f\u7406\u4ee5\u53ca\u63a9\u7801\u7684\u4f5c\u7528\u3002&nbsp;<a href=\"https:\/\/www.trugemtech.com\/zh\/\u4ec0\u4e48\u662f-netmask\/\" class=\"\" rel=\"bookmark\">\u9605\u8bfb\u66f4\u591a \"<span class=\"screen-reader-text\">\u4ec0\u4e48\u662f\u7f51\u7edc\u63a9\u7801\uff1f<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","_themeisle_gutenberg_block_has_review":false,"_ti_tpc_template_sync":false,"_ti_tpc_template_id":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-2777","post","type-post","status-publish","format-standard","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.6 (Yoast SEO v23.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Netmask?<\/title>\n<meta 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class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/\",\"url\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/\",\"name\":\"What is Netmask?\",\"isPartOf\":{\"@id\":\"https:\/\/www.trugemtech.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.trugemtech.com\/wp-content\/uploads\/2024\/12\/192.168.1.1.jpeg\",\"datePublished\":\"2024-12-17T09:20:56+00:00\",\"dateModified\":\"2024-12-17T09:21:22+00:00\",\"author\":{\"@id\":\"https:\/\/www.trugemtech.com\/#\/schema\/person\/37f291ae0f613f8e46427f8cafb22d4b\"},\"description\":\"This blog explained what is netmask, how it works, how to read, how to calculate and its role in subnetting and IP 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Do I Find the Netmask of My Network?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<em>You can find the netmask of your network using the following methods:<br\/>On Windows: Use the ipconfig command in Command Prompt.<br\/>On Linux\/Mac: Use the ifconfig or ip a command in the terminal.<\/em>\",\"inLanguage\":\"zh-Hans\"},\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423353556\",\"position\":2,\"url\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423353556\",\"name\":\"Can I Change the Netmask of an Existing Network?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<em>Yes, you can change the netmask, but it requires reconfiguring all devices in the network. Changing the netmask may also affect IP address assignments.<\/em>\",\"inLanguage\":\"zh-Hans\"},\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423376822\",\"position\":3,\"url\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423376822\",\"name\":\"Can I Have Different Netmasks on the Same Network?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<em>While possible, it is not recommended. Different netmasks on the same network can cause communication issues and routing errors.<\/em>\",\"inLanguage\":\"zh-Hans\"},\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423394886\",\"position\":4,\"url\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423394886\",\"name\":\"Can a Netmask Be Larger Than 32 Bits?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<em>No, a netmask in IPv4 cannot exceed 32 bits. IPv4 addresses are limited to 32 bits in total.<\/em>\",\"inLanguage\":\"zh-Hans\"},\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423494674\",\"position\":5,\"url\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423494674\",\"name\":\"How Does a Netmask Affect Network Communication?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<em>A netmask determines the boundaries of a network. Devices must have the same netmask to communicate within a local network. Incorrect netmasks can lead to communication failures.<\/em>\",\"inLanguage\":\"zh-Hans\"},\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423513901\",\"position\":6,\"url\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423513901\",\"name\":\"Can I Use a Netmask to Block or Allow Access to Certain IP Addresses?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<em>No, a netmask alone cannot block or allow IP addresses. However, it can be used with access control lists (ACLs) or firewalls to define network boundaries for access control.<\/em>\",\"inLanguage\":\"zh-Hans\"},\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423531605\",\"position\":7,\"url\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423531605\",\"name\":\"How Does a Netmask Relate to Internet Protocol (IP) Routing?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<em>A netmask is essential for IP routing because it helps routers determine the destination network. When a data packet is sent, the router uses the destination IP address and the netmask to identify the correct network to forward the packet to. Without a netmask, routers cannot distinguish between different networks, causing routing failures.<\/em>\",\"inLanguage\":\"zh-Hans\"},\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423547033\",\"position\":8,\"url\":\"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423547033\",\"name\":\"Can Netmask Affect Network Performance?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<em>Yes, an incorrectly configured netmask can impact network performance by causing routing errors, unnecessary broadcast traffic, or IP conflicts.<\/em>\",\"inLanguage\":\"zh-Hans\"},\"inLanguage\":\"zh-Hans\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"\u4ec0\u4e48\u662f\u7f51\u7edc\u63a9\u7801\uff1f","description":"\u672c\u535a\u5ba2\u89e3\u91ca\u4e86\u4ec0\u4e48\u662f netmask\u3001\u5b83\u662f\u5982\u4f55\u5de5\u4f5c\u7684\u3001\u5982\u4f55\u8bfb\u53d6\u3001\u5982\u4f55\u8ba1\u7b97\u4ee5\u53ca\u5b83\u5728\u5b50\u7f51\u5212\u5206\u548c IP \u901a\u4fe1\u4e2d\u7684\u4f5c\u7528\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.trugemtech.com\/zh\/\u4ec0\u4e48\u662f-netmask\/","og_locale":"zh_CN","og_type":"article","og_title":"What is Netmask?","og_description":"This blog explained what is netmask, how it works, how to read, how to calculate and its role in subnetting and IP communication.","og_url":"https:\/\/www.trugemtech.com\/zh\/\u4ec0\u4e48\u662f-netmask\/","og_site_name":"IoT Solutions- AIoT-Vehicle Gateway - 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\u8f66\u8f86\u7f51\u5173 - \u7269\u8054\u7f51\u7f51\u5173 - \u5de5\u4e1a\u8def\u7531\u5668","description":"\u52a9\u529b\u6570\u5b57\u5316\u8f6c\u578b","alternateName":"IoT Solutions- AIoT - Vehicle Gateway - Edge Computing Gateway","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.trugemtech.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.trugemtech.com\/#\/schema\/person\/37f291ae0f613f8e46427f8cafb22d4b","name":"\u7ba1\u7406","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.trugemtech.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/258d8dc916db8cea2cafb6c3cd0cb0246efe061421dbd83ec3a350428cabda4f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/258d8dc916db8cea2cafb6c3cd0cb0246efe061421dbd83ec3a350428cabda4f?s=96&d=mm&r=g","caption":"admin"},"sameAs":["http:\/\/47.111.181.115"],"url":"https:\/\/www.trugemtech.com\/zh\/author\/admin\/"},{"@type":"Question","@id":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423324448","position":1,"url":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423324448","name":"\u5982\u4f55\u67e5\u627e\u7f51\u7edc\u7684\u63a9\u7801\uff1f","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<em>You can find the netmask of your network using the following methods:<br\/>On Windows: Use the ipconfig command in Command Prompt.<br\/>On Linux\/Mac: Use the ifconfig or ip a command in the terminal.<\/em>","inLanguage":"zh-Hans"},"inLanguage":"zh-Hans"},{"@type":"Question","@id":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423353556","position":2,"url":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423353556","name":"\u80fd\u5426\u66f4\u6539\u73b0\u6709\u7f51\u7edc\u7684\u63a9\u7801\uff1f","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<em>Yes, you can change the netmask, but it requires reconfiguring all devices in the network. Changing the netmask may also affect IP address assignments.<\/em>","inLanguage":"zh-Hans"},"inLanguage":"zh-Hans"},{"@type":"Question","@id":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423376822","position":3,"url":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423376822","name":"\u540c\u4e00\u7f51\u7edc\u4e2d\u53ef\u4ee5\u6709\u4e0d\u540c\u7684\u7f51\u7edc\u63a9\u7801\u5417\uff1f","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<em>While possible, it is not recommended. Different netmasks on the same network can cause communication issues and routing errors.<\/em>","inLanguage":"zh-Hans"},"inLanguage":"zh-Hans"},{"@type":"Question","@id":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423394886","position":4,"url":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423394886","name":"\u7f51\u7edc\u63a9\u7801\u53ef\u4ee5\u5927\u4e8e 32 \u4f4d\u5417\uff1f","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<em>No, a netmask in IPv4 cannot exceed 32 bits. IPv4 addresses are limited to 32 bits in total.<\/em>","inLanguage":"zh-Hans"},"inLanguage":"zh-Hans"},{"@type":"Question","@id":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423494674","position":5,"url":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423494674","name":"\u7f51\u7edc\u63a9\u7801\u5982\u4f55\u5f71\u54cd\u7f51\u7edc\u901a\u4fe1\uff1f","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<em>A netmask determines the boundaries of a network. Devices must have the same netmask to communicate within a local network. Incorrect netmasks can lead to communication failures.<\/em>","inLanguage":"zh-Hans"},"inLanguage":"zh-Hans"},{"@type":"Question","@id":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423513901","position":6,"url":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423513901","name":"\u80fd\u5426\u4f7f\u7528\u7f51\u7edc\u63a9\u7801\u963b\u6b62\u6216\u5141\u8bb8\u8bbf\u95ee\u67d0\u4e9b IP \u5730\u5740\uff1f","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<em>No, a netmask alone cannot block or allow IP addresses. However, it can be used with access control lists (ACLs) or firewalls to define network boundaries for access control.<\/em>","inLanguage":"zh-Hans"},"inLanguage":"zh-Hans"},{"@type":"Question","@id":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423531605","position":7,"url":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423531605","name":"\u7f51\u7edc\u63a9\u7801\u4e0e\u4e92\u8054\u7f51\u534f\u8bae (IP) \u8def\u7531\u6709\u4f55\u5173\u7cfb\uff1f","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<em>A netmask is essential for IP routing because it helps routers determine the destination network. When a data packet is sent, the router uses the destination IP address and the netmask to identify the correct network to forward the packet to. Without a netmask, routers cannot distinguish between different networks, causing routing failures.<\/em>","inLanguage":"zh-Hans"},"inLanguage":"zh-Hans"},{"@type":"Question","@id":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423547033","position":8,"url":"https:\/\/www.trugemtech.com\/what-is-netmask\/#faq-question-1734423547033","name":"\u7f51\u7edc\u63a9\u7801\u4f1a\u5f71\u54cd\u7f51\u7edc\u6027\u80fd\u5417\uff1f","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<em>Yes, an incorrectly configured netmask can impact network performance by causing routing errors, unnecessary broadcast traffic, or IP conflicts.<\/em>","inLanguage":"zh-Hans"},"inLanguage":"zh-Hans"}]}},"_links":{"self":[{"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/posts\/2777","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/comments?post=2777"}],"version-history":[{"count":3,"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/posts\/2777\/revisions"}],"predecessor-version":[{"id":2781,"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/posts\/2777\/revisions\/2781"}],"wp:attachment":[{"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/media?parent=2777"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/categories?post=2777"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.trugemtech.com\/zh\/wp-json\/wp\/v2\/tags?post=2777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}